Alarm-augmenting means.



R. W. OREWILER.

ALARM AUGMENTING MEANS,

APPLlCATlON FILED OCT. 2,.19l4.

Patented Nov. 28, 1916.

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RAY W. OREWILER, 0F PORTLAND, OREGON.

ALARM-AUGMEN TIN G MEANS.

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Specification of Letters Patent.

Patented Nov. 28, 1916.

Application filed October 2, 1914. Serial No. 864,699.

To aZZ whom it may concern:

Be it known thatl, RAY W. .OREWILEn, a citizen ofthe United States, and aresident of Portland,Multnomahcounty, State of Qregon, have invented a new and useful Improvement in Alarmerlugmenting Means, of'which the followingis aspecification.

This invention relates generally to calling. or alarm mechanism, and particularly to the alarm mechanism of telephones, and has for its object the providing of means whereby the alarm is augmented so as to be more readily heard.

In manufacturing establishments the ringing of the bells of a telephone is frequently not loud enough, .or is notcontinued long enough, to be heard over the din of the ;.shop;, and by my invention I combine with this primary alarm mechanism, auxiliary alarm mechanism thrown into and out of action by the telephone alarm mechanism, by so doing giving a loud alarm. And I furthermore make my auxiliary alarm mechanism adjustable so that the alarm may be continued for as long a period as desired, and thus render the same more effective.

The construction and operation of my invention are more readily understood by a description of the accompanying drawings.

In the latter, Figure 1, is an elevation showing one type of my invention as used in connection with a telephone circuit. In this construction of my invention, an electrical horn is thrown into a battery circuit, by the operation of a relay placed in the telephone circuit, and the horn is maintained in said battery circuit for a predetermined period of time after such operation by a pneumatic cylinder and piston therein; Fig. 2, is a sectional detail of the lower end of the cylinder and the piston reciprocable therein; Fig. 3 is a fragmenhl plan view showing a detail of construction; and Fig. 4 is a fragmental plan view showing an alternate detail of construction.

In these drawings, a wall bracket, 1, has mounted upon it an electro-magnet, 2. Said magnet is provided with an axial bore, 3, in which a movable core or armature, 4. is reciprocable. Into the lower end of this core, 3, is threaded the rod, 5, of a piston, 5, which reciprocates in the cylinder 6. check valve represented by, 7, fixed in the lower end of this cylinder, 6, permits air to flow into the latter, but checks the out-flow.

The cylinder, 6, is fastened on the wall bracket, 1, by a strap, 6*.

In'thelowerend of the cylinder, 6, is a- ,needle valve element, 8, (see Fig. 2,) cons1st1ngor" the air-duct, 8 and thead ustable screw, 8.

.On the piston rod, 5, is a cross arm, 9, one

end of whichis slotted and such end slides on the guide-rod, 10, so as to hold the piston rodagainst rotation. On the other end of lie in the path of motion of the arm, 11. In

this way when the piston-rod, 5, is raised the arm, 11, will bear against and push in the button, 1 L, thereby closing the switch. 13. .16 and 17 represent the circuit wires of the telephone branch.

18, represents a commercial relay switch, which is mounted on the bracket, 1, and is connected with the telephone circuit wires, 16 and L7. In my invention this relay switch is so connected with the circuit wires, 19 and 20, of the electro-magnet, 2. that when the relay is operated by the closing of the telephone circuit, the circuit of the battery, 21, will be closed; and since the electro-magnet, 2, is also in the circuit of the battery, 21, such closing will energize the electromagnet 2.

24, is an electric horn mounted on the bracket, 25, fastened on the shelf. 26. The wires 22, 23, and 27 form a circuit through the battery 21, said circuit being controlled, by a push-button switch 13.

The operation of this type of my device is as follows: lVhenever the telephone circuit is closed the electro-magnet, 2, will be energized through the closing of the relay switch, 18, and the magnet core, 4, will thereupon be pulled up to the position shown on the broken lines in Fig. 1. This movement will cause the arm, 11, to bear against and push in the push-button, 14:, thereby closing the battery circuit of the horn, 24, and causing the latter to blow steadily. If desired, the arm may be crimped as shown by 11 in Fig. 4: so as to cause the horn to give a succession of short blasts. The upward movement of the armature, 4:, will pull up the piston in the cylinder, 6, and by the adjustment of the valve, 8, in the lower end of the pneumatic cylinder, the return movement of the piston, after the circuit of the magnet, 2, has been broken by the interruption of the telephone circuit, may be controlled as desired, with reference to .the length of time the sounding of the horn, 2i, shall continue; for the push-button switch, 13, will be maintained in a closed state until the arm 11, is dropped away from it. However the alarm may be discontinued at any time, by manually forcing the piston down.

I claim:

1. In an electric signaling apparatus, the combination with a main circuit, of an auxiliary circuit, energizing means therefor, a signaling device in said auxiliary circuit, a switch, normally open, for closing said aux iliary circuit, a shunt circuit connected with the auxiliary circuit, an electro-magnet in said shunt circuit provided with a movable core, a relay switch connection between the shunt circuit and the main circuit, a member carried by the movable core adapted to bear against and close the switch of the auxiliary circuit when the magnet is energized, and adjustable means for retarding the return of the core to normal position after the magnet has been de-energized.

2. In an electric signaling apparatus, the combination with a main circuit, of an auxiliary battery circuit, an electric horn in said auxiliary circuit, a push-button switch, normally open, for closing said auxiliary circuit, a shunt circuit connected with the auxiliary circuit, an electro-magnet in said shunt circuit provided with a movable core, a relay switch connection between the shunt circuit and the main circuit, a fluid cylinder located beneath the magnet, a piston carried by the magnet core operating in said cylinder, an arm carried by the piston rod adapted to bear against and close the pushbutton switch of the auxiliary circuit when the core is attracted by the magnet, and a needle valve in said cylinder for retarding the return of the core to normal position after the magnet has been deenergized.

RAY W. OREWILER. Witnesses:

ROWENA COOHRAN, WM. C. SoHMrr'r.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of latents, Washington, D. G. 

